a HANS device sits on your shoulders and attaches to your helmet. nothing to fit to the car.
Doesn't it have to fit to the car or seats? I mean, what's the point of a restraint - if it's anchor is you?edit: ok - never really looked into the details of it before, interesting!
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http://en.wikipedia.org/wiki/HANS_deviceIt is attached only to the helmet -- and not to the belts, driver's body, or seat -— by two anchors on either side, much like the Hutchens device but placed slightly back. The seat belts that cross the driver's upper-body are properly installed so that the belts go right over the HANS device, on the driver's shoulder, and buckle into the center of the driver's stomach. Therefore, the HANS device is secured with the body of the driver, not the seat.